Improvement in chasing-mills



W. M. FORCE.

Chasing Mill.

' No. 44,298. I Patented Sept. 20, 1864.

UNITED STATES PATENT OFF CE.

WILLIAM M. FORCE, OF NEWARK, NEW JERSEY.

IMPROVEMENT IN CHASING-MILLS.

Specification forming part of Letters Patent No. 44,298, dated September 20, 1864; antedated June 6, 1864.

To all whom it may concern Be it known that I, WILLIAM M. Format, of Newark, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in the Beds of Chasing- Mills; and I do hereby declare that the same are described and represented in the following specifications and drawings.

To enable others skilled in the art to make and use my improvements I will proceed to describe their construction and the mode of using them, referring to the drawings, in which the same letters indicate like parts in each of the figures.

Figure 1 is a plan of the chasing-mill bed without the cover; Fig. 2, a section through the center of Fig. 1, with the cover.

The nature of my invention and improvement in chasing-mills consist in making a heating-bed outside of and around the grinding-bed of a chasing-mill, to receive and heat the materials ground and prepare them for pressing, or the next operation; and in a cover for the heating-bed to retain the heat and moisture in the materials heated; also in making the grinding-surface of a chasingmill bed grooved or ribbed.

In the accompanying drawings, A is the cast metal bed of a chasing-mill, made in the form shown, or in such other form as will answer the purpose. Its dimensions may be varied, but 1 have made and used one eight feet in diameter, with a grinding or mulling bed five feet and a half in diameter,with a hole in or through the center for the shaft of the chasing-wheels. I make the grinding-bed about two inches thck, with a flange, 13, around the hole for the shaft and another flange," Q, making it higher than the heatingbed. In the circular groove between the flanges I fit a series of pieces of cast-iron or other metal about one-inch thick, with ribs on the upper surface about one-inch wide and about one-half inch high, with spaces or grooves between the ribs about three-fourths to one inch wide. These grooved pieces D D are bolted or screwed to the bedA, so that the ribbed surface forms the bed on which the chasing-wheels of the mill run to grind or mull the flaxseed-meal and prepare it to be pressed. By making the working-surface of I the grinding-bed separate from the bed A, it can be easily and readily removed when worn out, and a new one put in its place, with very little delay in the use of the mill, and at a trifling cost in comparison to an entire new bed. It also prevents the meal from slipping until properly prepared and, if preferred, this ribbed plate may be made in one circular piece, instead of several. The bed A, outside and below the flange C, is made about one inch thick, with a rib, E, at its inner edge and a flange, F, at its outer edge, for the iron or boiler plate G to lie on, and to which it is fastened with bolts, rivets, or otherwise, to form the heating-bed around the grinding-bed with a steam-chamber, H, under it, for the steam to heat it, which enters through the hole I and passes around each way to the hole J, through which the waste steam and condensed water escapes, both of which holes are in the cast iron bed A, as shown in section, Fig. 2. The cover K is made of sheet metal to fit the outside of the flange F and the top of the cover is madea little higher than the flange O, and also a little larger, so that the meal ground or mulled will fall from the grinding and mulling bed through the space L, between the inside edge of the cover K and the flange O on to the heating bed or plate G, where it is heated and stirred by a stirrer fastened to an arm from the perpendicular shaft of the chasing-wheels, which arm passes around in the space L. Scrapers and stirrers are so common and well known in chasinglIllllS a further description is not deemed necessary here. The mulled meal, after being heated, passes through one or more openings in the sideof the cover, ready for the press. The cover K protects the meal while it is being heated, forming a kind of oven to retain the heat and moisture in the meal.

It is a great advantage to groove the grinding or mulling bed of a chasing-mill, as it prevents the meal or material being ground from slipping on the bed, and enables one mill to do the work of two or three, as heretofore constructed. The meal is supplied near the center of the grooved bed and is gradually and automatically worked outas it is ground 2. In combination with a heating-bed arranged around the grinding-bed of a chasingmill, the cover K of the heating-bed, for the purpose set forth substantially as described.

. WM. M. FORCE.

Witnesses:

H0111). K. BROWN, WM. II. W001). 

